Plastic plug with overcap



FIG. 1 is a perspective view of a plastic plug with overcap, showing my new design;

FIG. 2 is a front elevational view thereof; the rear elevational view and the left and right side elevational views being the same;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

In FIGS. 1 and 3, the broken lines consisting of two short dashes followed by a long dash show surface shading indicating an edge with a slight radius.

In FIG. 2, the broken lines around the perimeter of the plug show the threads of the plug in elevation.

In FIG. 4, the five concentric circles drawn in broken lines in the center of the inside of the plug depict environmental subject matter only and form no part of the claimed design. The remaining broken lines show surface shading. 

The ornamental design for a plastic plug with overcap, as shown and described. 